ID: 31538
User updated by: rudy dot metzger at xs4all dot nl
Reported By: rudy dot metzger at xs4all dot nl
Status: Open
Bug Type: MySQLi related
Operating System: Fedora Core 3
PHP Version: 5.0.3
New Comment:
Used DB versions
MySQL-devel-4.1.7-0
MySQL-shared-4.1.7-0
MySQL-server-4.1.7-0
MySQL-client-4.1.7-0
Previous Comments:
------------------------------------------------------------------------
[2005-01-13 15:42:01] rudy dot metzger at xs4all dot nl
Description:
------------
When connecting to a database, then forking off a new child, the
database connection will be terminated (disconnected) when the child
exits.
I have the feeling that at the "cleanup" of the child process the
database connection is closed. This should not be the case because the
master process might still use it.
This is not the case with the mysql extension, only with mysqli. With
the mysql extension, you might be required to give the optional
parameter "open new session" on the connect. at least this is what I
did.
Reproduce code:
---------------
<?php
function ping_db( $res, $msg )
{
if ( mysqli_ping($res) )
echo getmypid()." $msg: still alive\n";
else
echo getmypid()." $msg: died\n";
}
function SigChild( $signal )
{
while ( ($pid=pcntl_wait($status,WNOHANG)) > 0 ) {
if ( !pcntl_wifexited($status) )
echo "Collected killed pid $pid\n";
else
echo "Collected pid $pid\n";
}
}
declare(ticks=1);
pcntl_signal( SIGCHLD, 'SigChild' );
$res = mysqli_connect('localhost','zpc','zpc');
ping_db($res,'after connect');
$pid = pcntl_fork();
ping_db($res,'right after fork');
if ( !$pid ) { // --- the slave
echo "child sleep\n";
sleep(5);
echo "child exiting\n";
exit(0);
}
ping_db($res,'after fork');
echo "master sleep\n";
sleep(10);
ping_db($res,'after sleep');
while ( ($pid=pcntl_wait($status)) > 0 ) {
if ( !pcntl_wifexited($status) )
echo "Collected killed pid $pid\n";
else
echo "Collected pid $pid\n";
}
mysqli_close( $res );
?>
Expected result:
----------------
The database connection in the master should not have terminated.
Actual result:
--------------
6311 after connect: still alive
6313 right after fork: still alive
child sleep
6311 right after fork: still alive
6311 after fork: still alive
master sleep
child exiting
Collected pid 6313
6311 after sleep: died
In the last line you can see that the connection died (6311 is master,
6313 is child)
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=31538&edit=1
